Diretor/a
Alan Gibson
DIRETOR/A
Elenco (na ordem dos créditos)
Patrick Barr
Mackenzie-King
Michael Barrington
Gerald Gardiner
Anthony Bekenn
Canadian policeman
John Bryans
Fuchs' contact
Antony Carrick
Commander Burt
Michael Craig
Bruno Pontecorvo
Ellis Dale
Clement Attlee
Victoria Fairbrother
Betty
John Franklyn-Robbins
Skardon
James Greene
British High Commission
Laurence Herder
Sub-editor
Boris Isarov
Igor Gouzenko
Peter Jeffrey
Major Phillips
Desmond Jordan
Senior Scientist
Geoffrey Keen
Lord Chief Justice
Sandra Payne
Marianne Pontecorvo
Olaf Pooley
Lord Halifax
Charles Rae
British policeman
Andrew Ray
Klaus Fuchs
Zhivila Roche
Anna Gouzenko
Robert Sansom
Lord Chief Justice Goddard
Tony Sibbald
Aide
Ray Smith
Doctor Cockcroft
Ernst Walder
Russian Ambassador
Edward Wilson
Alan Nunn May